Fassel (translated "barrel") is a surname of German origin. Notable people with the surname include:
Gerda Fassel (1941–2025), Austrian sculptor Hirsch Bär Fassel, (1802 – 1883), pioneer of the Reform Judaism movement Jim Fassel (1949–2021), American football coach John Fassel (born 1974), American football coach Preston Fassel (born 1985), Jewish-American writer
See also Fasel, surname Fossel, surname